OPTIMIZATION AND SIMULATION OF PEROVSKITE BASED SOLAR CELLS

Abstract

There has been a significant efficiency jump in photovoltaic research of Perovskite Solar Cells, which can be credited to Perovskite’s optoelectronic properties like tunable band gap and high absorption coefficient. Efficiency depends upon exciton generation, as it is a product function, which in turn depends on the material i.e., a material with low band gap will absorb the light in near IR range. Even though Perovskite materials have high efficiency but they have stability issues in ambient conditions, in addition metal-halide perovskite like CH3NH3PbI3 is preferred but lead (Pb) is a toxic element, hence it should be substituted with safer elements like Bismuth or Silicon. In this study, several other perovskite materials (CH3NH3GeI3, Cs2TiBr6, Cs2TiI6 and Cs2TiCl6) have been considered and their power conversion efficiency was calculated by numerical simulation using Solar Cell Capacitance Simulator (SCAPS- 1D) software. Other than the perovskite materials itself, the thickness of the materials, defect density and device temperature have also been varied to optimize the parameters. Finally, comparisons have been made to determine the suitable perovskite material against their defect density, layer thickness and device temperature.